Adjustable frame for printing films



(ModeL) 2 Sheets-Sheet 1.

B. DAY. ADJUSTABLE FRAME FOR PRINTING FILMS.

No. 250,211. Patented Nov. 29,1881.

WIHHH INVENTOR:

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- B. DAY.

I ADJUSTABLE FRAME FOR PRINTING FILMS.

No. 250 211. Patented Nov. 29,1881..-

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' UNITED STATES PATENT OFFICE.

BENJAMIN DAY, OF WEST HOBOKEN, NEW JERSEY.

ADJUSTABLE FRAME FOR PRINTING-FILMS.

SPECIFICATION forming part of Letters Patent No. 250,211, dated November 29, 1881.

Application filed July 15, 1881.

To all whom it may concern:

Be it known that LBENJAMIN DAY,Of West Hoboken, in the county of Hudson and State of New Jersey, have invented a new and Improved Adjustable Frame for Holding Printing Mediums or Films, of which the following is a specification.

The object of my invention is to provide a new and improved vertically and laterally ad- 1 o justableframefor holding a printing mediumforinstance, such as the printing-film for which Letters Patent were issued to me on the 22d day of April, 1879, and numbered 214,493.

The invention consists in aframe having the printing-film attached thereto, and provided with clamping devices for holding it, and which are detachably hinged to longitudinally and transversely adjustable blocks held in clamps on a vertically-adjustable frame surrounding the stone or block, so that the swing ing film-holding frame will rest 011 the block or stone.

The invention further consists in the arrangement and construction of parts and details, as will be more fully described hereinafter.

In the accompanying drawings, Figure l is a perspective view of my improved adjustable frame for holding a printing medium. Fig. 2 is a plan view of one of the hinge-blocks to which the swinging frame is pivoted. Fig. 3 is a plan view of the other like hinge-block, parts being shown in section. Fig. is a plan view of the upper or hinged end of the frame to which the printing medium or film is attached and of the clamps on this frame. Fig. 5 is a plan view of the under side of the clamps. Fig. 6 is a plan view of the under side of the hinge-blocks. Fig. 7 is a front end elevation of thesame. Fig. Sis a cross-sectional elevation of this hinge-block, of the frame surrounding the stone, of the screw-standards of this frame, and of the clamps for holding this frame on the standards. Fig. 9 is a plan View of the under side of the clamp for holding the frame on the screw-standard.

Similar letters of reference indicate corresponding parts.

The printing-film A or any other suitable printing medium is attached to the lower surface of a light frame, B, which rests upon the (Model.)

upper surface of a lithographic stone, A, or other block upon which the drawing or design is to be fixed. A clamp, B, provided with sharp-edged lugs B is held 011 each end of one bar of the frame B by means of cam-levers B or eccentrics with handles pivoted to the clamps. These clamps B are provided with lugs C, which extend beyond the ends of the bar to which the clamps are held, these lugs 0 being provided with recesses a in their outer surfaces. Into these apertures or recesses a a, the beveled ends or points of the pintles D D pass, these pintles being loosely mounted in the adjustable bearing-blocks E E held between the jaws F and F of plates G and G provided with'sharp-edged lugs H H and with cam-levers J J or eccentrics with a handle for clamping the plates G and G2 to a bar, K, of a frame surrounding the stone and resting on clamp-plates L, attached to the upper ends of screws M passing through a nut, M, and into a standard, M one of which is arranged at each corner of the base-board N. A binding-screw, N, holds the nut M on the standard M The rail or bar K of the frame surrounding the stone A rests on the ends of the side bars or Tails, K and K and is held on the same by means of a movable or detachable screw-clamp, O.

The pintle D can move in the direction of its length in the bearing-block E, and its point is pressed toward the point of the pintle D by a spiral spring, P, interposed betweena shoulder near the head of the pintle and the bearing-block E. The pintle D is threaded and tits into a corresponding aperture in the bearing-block E and its outer endis provided with a head or button, Q. A locking-nut, R, with a handle, R, is mounted on the pintle D between its point and the bearing-block, this locking-nut resting against the end of the bearing-block.

The bearingblocks E and E are movable between the jaws-that is, they can be moved in a direction at right angles to the length of the pintles D and D For this purpose these bearing-blocks are loosely mounted on a pintle or short shaft, S, connecting the jaws F F or F F and on a screw, T, also passing through opposite jaws, and provided at the outer end with a knob or button, U, and with a pointer, V, resting against or directly in front of a subdivided dial, W, attached to the front side of the front jaw, F or F The screws T have thirty -two (or more or less) threads to the inch, and one complete turn of the same moves the block E or E one thirty-second of an inchin the direction of the length of the screw. By means of the pointer V and the scale on the dial W the most minute movements of the screws can beregulated and measured.

The printing-surface oftheprinting-film may be stippled, ruled, or cross hatched with straight or curved lines,accordingto the work desired.

The operation is as follows: According to the kind of work desired, a film, A, with a stipple, rulings, 850., is placed in the clamps B. If, for instance, the picture on the stone is to be shaded by means of horizontal parallel straight lines, as shown at X on Sheet 1, a corresponding printing-film is used. This film having been inked, the lines are transferred on the stone by means of a stylus, after which the film is removed, which is accomplished by pressing the spring pin D toward the block E, as indicated by the arrow a. The film is then reinked, is again placed between the pintles D and D and is then shifted a greater or less distance, according to the thickness or spacing of the lines desired, and the lines are transferred on the stone by means of a stylus, and so on. If close lines are desired, the frame B is adjusted by means of the screws T T to such an extent that the lines printed the second time will be between those printed the first time, as shown at X, Sheet 1; but ifthe lines are to be very heavy, the frame B is so adjusted that the lines printed the second time will partly cover or will be in contact with the lines printed first, so that these first lines will be increased in thickness, and in this manner lines can be produced of any desired thickness. To produce such lines care must be taken to move or turn both screws T exactly the same distance, which can be regulated very conveniently by means of the pointers V and dials W. If the lines are to increase in thickness from one end to the other, only one screw T is turned. If the lines run diagonally, the frame is adjusted in the same manner. Lines running parallel with the side bars of the frame B are adjusted by means of the screw pintle D If longitudinal or transverse waved lines are desired, the frame Bvmust be adjusted longitudinally and transversely. For stippling, the frame B is adjusted in a similar manner. The first print produces the stipple shown at Y, Sheet 1, a second print produces the stipple Y and a third the stipple Y To obtain this result the frameB must be so adjustedthat theseveral stipples of the several different prints will be united to form larger stipples. If stipple-shading is desired, as shown at Z, Sheet 1, the frame B is adjusted after each print 5 but only certain parts of the printing-film A are operated upon with the stylus at the second, third, fourth, 850., prints, according to the shading of the picture or print desired.

If desired,different-colored inks may be used for the different prints.

The stipple, straight, and waving lines may be combined to produce various effects.

The frame surrounding the stone can be adjusted in size by means of the clamps O to suit the stone A, and the height can be adjusted by means of the screws M and nuts M. In place of the devices described for adjusting the frame B, other similar devices may be used; but I prefer to use those mentioned above.

In place of the printing-film described, other similar devices may be used with my improved frame for holding printing mediums. For instance, I can take a sheet of flexible 'gelatinepsmooth on both sides, and make an impression thereon with a relief-plate, then reink this plate and make several impressions registering with each other, upon which the printed part of the gelatine can be transferred upon a stone by means of a stylus or otherwise, the film or gelatine plate being held in my improved frame; or a film can be made by preparing a sheet of gelatine with the bichromate of potash or any kindred chemical having the same action, which sheet can then be exposed through a negative of lines, dots, stipples,&c. Theunafi'ected parts of the gelatine are washed away, giving the lines, dots, &c., sufiicient relief to be inked with a printers roller. This film is mounted in my improved frame in the same manner as the other films, and as herein shown and described.

Havin g thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with the frame to which the printing medium is attached, of longitudinally and transversely adjustable hinges, substantially as herein shown and described, and for the purpose set forth.

2. The combination, with the frame to which the printing medium is attached, of longitudinally and transversely adjustable hinges, and of a frame partly surrounding the stone or block, substantially as herein shown and described, and for the purpose set forth.

3. The combination, with the frame to which the printing medium is attached, of longitudinally and transversely adjustable hinges, and of a longitudinally and vertically adjustable frame partly surrounding the stone or block, substantially as herein shown and described, and for the purpose set forth.

4. The combination, with the frame B, to which the printing-film A is attached, of the clamps B, the spring-pintle D, the screw-pintle D, and bearing-blocks E E substantially as herein shown and described, and for the purpose set forth.

5. The combination, with the frame B, to which the printing-film A is attached, of the 5 shown and described, and for the purpose set forth.

6. The combination, with the clamp-plate G, provided with jaws F, of the block E, the screw T, the dial W, and the pointer V, sub- 10 stantially as herein shown and described, and

for the purpose set forth.

7. The combination, with the clamp-plate G provided with jaws F F of the block E the screw-pintle D and the locking-nut R,

15 with a handle, R, substantially as herein shown and described, and for the purpose set forth.

S. The combination, with the frame B, of the frame formed of the rails K, K and K the screws M, the nuts M, the binding-screws IN, and the standards'M substantially as herein shown and described, and for the purpose set forth.

9. A mechanism for using printing mediums, made substantially as herein shown and described, and containing the following elements, to wit: a frame to which the printingfilm is attached, longitudinally and transversely adjustable hinges for this frame, and a vertically and longitudinally adjustable frame partly surrounding the stone and carrying the adjustable hinges of the film-holding frame, combined as set forth.

BENJAMIN DAY.

Witnesses:

, OSCAR F. GUNz,

EDGAR TATE. 

